Artikel (426)
Study of Root Exudate Organic Acids and Microbial Population in the Rhizosphere of Oil Palm Seedling
Mutual interaction between plants and microbes occured in the rhizosphere is expected to increase productivity of crops or soil fertility for agriculture. Plants excrete root exudates to attract microbes, and then microbes obtain habitat and food supply from plants and can fulfill the nutrient requi...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 1: January 2017; 29-36 | 2017
The practices of tin mining which removing all layers of soil on deposits of minerals caused the seriously environmental problems, i.e degradation of physical and chemical soil, disappearance of vegetation, flora and fauna in ecosystems that changed the microclimate. In the tailings area of tin mini...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 1: January 2017; 21-28 | 2017
Peat soil amelioration has important role on improvement of soil peat fertility such as on increasing soil pH, reducing organic acid and toxic ions, and also increasing nutrients availability. Soil amelioration with polyvalent cations (Fe Al Cu Zn) namely slag, lateritic soils, and river...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 1: January 2017; 11-20 | 2017
The conversion of peat soils to agricultural uses has been thought to increase CO2 emission due to several factors, including fertilization. However, evidence on the effect of fertilization on CO2emissionsfrompeat soils is rareand often inconsistence. We measured the effects of different types of fe...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 1: January 2017; 1-9 | 2017
This study aimed to examine Organonitrofos Plus fertilizer (OP) on sweet corn (Zea mays Saccharata L.) and its effect on changes in soil chemical properties of Ultisols. Organonitrofos Plus fertilizer is an enhancement of Organonitrofos fertilizer enriched with microbes at the beginning of the manuf...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 1: January 2016; 9-17 | 2016
A field experiment was conducted to find out a combination dose of a novel organic fertilizer (Organonitrophos, OP) and inorganic fertilizers (N, P, and K) for the growth and yield of cassava (Manihot esculenta Crantz) during two planting periods of 2012-2013 and 2013- 2014 in ultisol soil (low in n...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 3: September 2015; 167-172 | 2016
Effect of fertilization on the growth and biomass of Acacia mangium and Eucalyptus hybrid (E. grandis x E. pellita) on third rotation is still not well understood to support judicious application in large scale forest plantations. A field experiment aimed at understanding these questions was con...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 3: September 2015; 157-166 | 2016
Harapan forests is the first restoration forest in Indonesia, includes several different ecosystems. Different ecosystems have different characteristic to affect the diversity and abundance of Collembola. In the ecosystem, Collembola have an important role in biocontrol, decomposition, soil nutrient...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 3: September 2015; 173-180 | 2016
There were five emergence plants in swampland such as Polygonum barbatum, Neptunia prostrata, Phragmites karka, Ludwigia adscendens and Phragmites communis, which might be used for compost source, all the plants were easily adapted and grew very well on acid soil. These plants were choosen becau...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 3: September 2015; 149-155 | 2016
The objective of the research was to study the interaction between dose of humic acid and nitrogen fertilizer on the growth and yield of rice. The experiment was conducted in May until September 2014 in Sukamanah village Cipedes sub-district Tasikmalaya city. A field experiment was done using as...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 3: September 2015; 143-148 | 2016